Loom for weaving



April 1943- A. MOESSINGER V 2,316,703

LOOM FOR WEAVING Filed March 14, 1941 INVENTOR ATTORW Patented Apr. 13,1943 LOOM FOR WEAVING Albert Moessinger, Winterthur, Switzerland, as-

signor to Sulzer Freres, Socit Anonyme, Win-- terthur, SwitzerlandApplication March 14, 1941, Serial No. 383,327 In Switzerland March 21,1940 4 Claims. (01:139-188) The present invention relates to weaving andmore particularly to a loom employing a nipper device for inserting theweft into the shed and fixed weft bobbins, the said gripperdevice beingguided by means rigidly connected to the slay.

An object of the invention resides in the provision of means whichassure that the average direction of the motion of the guide means mov--ing with the slay is set obliquely to the central plane of the shed, insuch a way that the whole guide means is swung-inat the same side of thefabric. The average direction of motion of the slay with respect to thecentral plane of the shed may be chosen so oblique that, when beating upthe weft, the shuttle guide can pass along without touching the temples.The weft inserting device may be guided all round by the guide means.

Guidance of the shuttle in the shed by means of a tooth-shapedguide-element fixed on the slay is known per se. All conventionalconstructions however suifer from the drawback that no guiding ispossible along the broad side of the normal roller temple, because theguide means would collide with the roller temple during the beatingupoperation.

An interruption of the guide effect for at least 4 inches is of no greatconsequence inslow-speed machines with large, long shuttles and withrigid weft needles. Thoroughtests have shown that such an interruptionof the guide eifect is absoluteiy impossible in the case of high-speedmachines with very small shuttles or with thin, flexible weft needles.

Guide means have been proposed which carry out an additional movementrelatively to the slay so that the shuttle guide is opened during thebeat. Such constructions suffer from excessive wear and the guide effectis inaccurate'after a short time of use. The present invention providesmeans for overcoming the shortcomings of the conventional mechanisms.According to the invention the direction of movement of the slay isinclined with respect to the center plane of the shed so that theguidemeans move outside of the fabric and of the temples.

With an arrangement according tothe present invention the weft insertingmeans are guided all around and in all directions.

Further and other objects of the present in vention will be hereinafterset forthin the accompanying specification and claims and shown in thedrawing which, by way of illustration, shows what I now consider to bepreferred embodiments of my invention.

looms for I In the drawing:

Fig. 1 is a diagrammatic part sectional side view of a mechanismaccording to the invention.

Fig. 2 shows a modified guide-tooth for a weft needle.

Fig. 3'illustrates the shuttle guide seen from the side of the fabrictowards line III-III of Fig. 1.

Like parts are designated by like numerals in all figures of thedrawing.

Referring more particularly to the drawing, Fig. 1.illustrates the slaymechanism according to th invention, the solid lines showing themechanism in picking position and the dash and dotted lines showing themechanism in beating up position. A main shaft 2 which is driven by theloom is rotatably supported on frame member I. Eccentric 3 is keyed toshaft 2 and transmits by means of a connecting rod 4 and through pivotpin 5 a reciprocating motion to slay lever I which swings about pivotpin 6. Lever I is shown in solid lines in picking position i. e. in itsextreme position; the dot and dash showing I of the lever indicates itin its beating up position.

Slay 8 is mounted to the slay lever or arm I. The direction of movementof slay 8 and of arm 1 into position I is illustrated by means of thedot line 25. Slay 8 is provided with a groove 9 in which reed I0 isfirmly held by means of wedge member II and screws I2. A shuttle guideis mounted on the slay 8. This guide is formed by a T bar I3 havingslots 23 into which slots the guide plates It proper are inserted andsoldered to bar l3.

Fabric I5 is stretched by means of roller temples I6 and their cover I6.Warp threads I 1 form the-shed, the center plane of which is indicatedby the dash and dot line I8. An eightsided shuttle 20 moves in orimmediately adjacent to the center plane. I8. Reed I0 is in inclinedposition with respect to center plane It and is perpendicular orsubstantially perpendicular thereto, i. e. inclined relatively to thedirection of the beat, when in beating up position.

According to the invention the position of fulcrum 8 is located betweenan imaginary plane extending through the edge I9 of the fabric and atright angle to the plane I8, and warp beam 30 which is indicated insmall scale on Fig. 1. Because of this the slay 8 moves in an inclineddirection. The location of fulcrum B is so far to the left that theguide teeth 2| of the guide plates I4 pass below the temple roller I6and the general direction of movement of the slay is inclined withrespect to the center-plane of the shed.

means consists of a flexible strip 22 instead of a shuttle 20 as inFlgurel.

Fig. 3 is a. side view of the guide plates I seen from the side offabric I. The plates M are fixed in the slots 23. The T-bar i3 isconnected with the slay I as shown in Fig. 1.

While I believe the above described embodb ments of my invention to bepreferred embodiments, I wish it to be understood that I do not a desireto be limited to the exact details of design and construction shown anddescribed, for obvious modifications will occur to a person skilled inthe art.

I claim:

1. In a loom for weaving, a lay comprising support means disposedunderneath the warp threads, reed means connected with and projectingupwardly from said support means, weft insertion means, guide meansmounted on said support means forward of said reed with respect to itsmovement toward the finished fabric and projectingupwardly from said layand between the lower warp threads,'said guide means laterallysubstantially surrounding said insertion means and having marginalportions adapted to contact said weft insertion means and enclosing thecenter of gravity thereof, and weft thread passage means provided on theportion of said guide means facing said reed and opening toward saidreed.

2. In a loom for weaving, a lay comprising support means disposedunderneath the warp threads, reed means connected with and projectingupwardly from said support means, weft insertion means, guide meansmounted on said support means forward of said reed with respect to itsmovement toward the finished fabric and projecting upwardly from saidlay and between the lower warp threads, said guide means lat-. erallysubstantially surrounding said insertion means and having marginalportions adapted to contact said weft insertion means and enclosingthe'center of gravity thereof, and weft thread passage means. providedon the portion of said guide means facing said reed and opening towardsaidreed, said guide means being spaced from said reed and mounted tosaid support means and guiding said weft insertion means completelyindependently of said reed and having said marginal portions contactingsaid weft insertion means completely independently from said reed.

3. In a loom for weaving, a 1ay.comprising support meansdisposed'undemeath the warp threads, reed means connected with andprojecting upwardly from said support means, weft insertion means, guidemeans mounted on said support means forward of said reed with respect toits movement toward the finished fabric and projecting upwardly fromsaid lay and between the lower warp threads, said guide means laterallysubstantially surrounding said insertion means and having marginalportions adapted to contact said weft insertion means and enclosing thecenter of gravity thereof, weft thread passage means provided on theportion of said guide means facing said reed and opening toward, saidreed, and lay motion control means maintaining the top portion of saidguide means below the upper warp threads at all operating positions ofsaid lay.

4. In a loom for weaving, a lay comprising support means disposedunderneath the warp threads, reed means connected with and projectingupwardly from said support means, weft insertion means, guide meansmounted on said support means forward of said reed with respect to itsmovement toward the finished fabric and projecting upwardly from saidlay and between the lower warp threads, said guide means latr erallysubstantially surrounding said insertion means and having marginalportions adapted to contact said weft insertion means and enclosin thecenter of gravity thereof, weft thread passage means provided on theportion of said guide means facing said reed and opening toward saidreed, and lay motion control means maintaining the top portion of saidguide means below the upper warp threads at all operating positions ofsaid lay and -moving said top portion tangentially to the upperwarp-threads, said top portion having a marginal portion disposedparallel to the upper warp threads at the tangential point of movementof said top portion underneath the upper warp threads.

ALBERT MOESSINGER.

